Wear-resistant neoprene is waterproof and durable. Contains a main bag and two bags on both sides. Great usage to place mobile phones, keys, headphones and other items. The elastic waistband can be adjusted to a maximum of 50 inches to fit most people. Gray reflective tape keeps you safe when running in the dark. This Bodypack is suitable for most outdoor activities, such as running, jogging, marathon, traveling and walking. 15 1/2" L x 4" W